But on the same day, Baro's sister Cha Yoon Ji uploaded a selca of her with her dog Yulmoo, wearing the same hat. (Fans suspected he was envious of his sister's hat and borrowed it.)

Baro himself ended up coming forward and saying that he did indeed borrow the hat, by commenting on his sister's Instagram post, writing, "What am I supposed to do if you upload that [hat] today when oppa wore it today dongsaeng (angry)(angry)." 

Yoon Ji replied back with, "Sorry!!! It was totally totally totally on purpose hehe." 

Baro's younger sister Cha Yoon Ji is currently a trainee under WM Entertainment. While many had suspected in the past that she would be debuting as a member Oh My Girl, now fans think she'll be debuting through a different group later on. 

They're such real life siblings!

SEE ALSO: YoonA says she experienced mental burden of being the center of Girls' Generation